Method. Wash kidney and remove outer membrane and fatty tissue, halve and remove white tubes, cut in 1 inch pieces, cover with salted water and let stand 1 hour. Drain and cover with cold water and bring to boiling point and drain. Have beef cut 1 inch thick. Pound flour into beef with mallet – then cut into 1 inch cubes. Brown beef and kidney in fat and add onions before meat is full cooked. Add water to cover and simmer 1 1/2 hours (or longer if necessary) or until tender. Thicken broth and cover with drop biscuits and bake 20 minutes at 425 degrees. Mushrooms may be added, sauteed slightly. Delicious!